CNDP1 and diabetic kidney disease: Protection against DKD afforded by variants in the CNDP1 gene has been reported in many studies across different ethnicities, albeit not always related to the CNDP1 (CTG)n polymorphism (Chakkera et al. 2011; Guo et al. 2016; Kurashige et al. 2013; Tziastoudi et al. 2020; Yadav et al. 2016; Yahya et al. 2019).